Model 3511 Beverage Freezer Manual
Grindmaster Corporation
4003 Collins Lane
Louisville, KY 40245 USA
(502) 425-4776 (800) 695-4500
FAX (502) 425-4664
www.grindmaster.com
0804 Form # WH-305-02
Part # W0600114
© Grindmaster Corporation, 2004
PRINTED IN USA
Table of Contents
Safety Precautions .................................................................................................... 2
Freezer Applications & Specifications ..................................................................... 2 - 3
Installation ................................................................................................................. 4 - 6
Operation and Adjustments ...................................................................................... 6 - 7
Care & Cleaning ........................................................................................................... 8 - 11
Maintenance ................................................................................................................. 11 - 13
Troubleshooting ............................................................................................................ 14
Key Parts Identification ................................................................................................ 15
Assembly Diagrams ......................................................................................................... 16 - 18
Wiring Diagrams ............................................................................................................. 19 - 22
Refrigeration Diagram .................................................................................................... 24
Information contained within this manual is subject to change without notice.
Contact Grindmaster Corporation’s Customer/Technical Service Department at 1-800-695-4500 with any questions or for clarification.
Model 3511 Page 1
OPERATOR’S SAFETY PRECAUTIONS
IMPORTANT: Failure to comply with the following safety precautions may result in severe personal injury or damage
to the machine.
1. Read and understand the operating instructions in this manual thoroughly. Only allow properly trained persons to
operate this machine.
2. Note all warning labels on the freezer. If any warning labels are missing or damaged replace them immediately.
3. Do not wear loose fitting garments or jewelry which could cause a serious accident.
4. Stay alert at all times during operation.
5. Keep operating area clean.
6. Do not attempt any repairs unless the main power supply to the freezer has been disconnected. Contact
Grindmaster Technical Service for service assistance.
7. Do not put objects or fingers in the dispense plunger.
8. Do not operate freezer if any excessive noise or vibration occurs. Contact your authorized service agent.
9. Be certain machine is installed with adequate space for proper air circulation. (See installation section.) Failure to
provide sufficient ventilation will reduce freezer performance and void equipment warranty.
Located on the right, left and rear panels. (part # W0600218)
FREEZER APPLICATION AND SPECIFICATIONS
Model 3511
The freezer consists of a freezing cylinder with a rotating internal auger (dasher) that is belt-driven by an electric
motor. The auger scrapes frozen product off of the inside of the refrigerated cylinder. A torque sensing mechanism
controls compressor operation to maintain desired product consistency. The freezer utilizes an air-cooled refrigera-
tion system to freeze the product. A self-closing dispensing valve is attached to the front of the freezing cylinder. The
unit has an adjustable consistency control and an out of product indicator.
When properly operated and cared for, the Model 3511 will provide many years of service. Proper care includes
regular cleaning and maintenance. To minimize the amount of maintenance necessary, follow the operating
procedures outlined in this manual.
Product T
ips
The Model 3511 was designed to dispense a wide variety of frozen beverages including frozen fruit juice, frozen
lemonade, slush and frozen cocktails. These products can be served in consistencies ranging from thin to fairly
thick.
Two types of dispensing valve plungers and product consistency springs are available depending on the thickness of
the product being served. These parts are interchangeable depending upon your needs. One plunger, part
W0480438 has one horizontal outlet slot and is used to serve thin to medium products such as frozen lemonade and
slush. The other plunger, part W0480451 has two horizontal outlet slots and is used to serve thicker product such as
neutral base frozen cocktails. A red spring, part W0631239, is used on the drive motor to adjust product consistency
to serve thin to medium products. The yellow spring, part W0631238, is used for thicker product. The spring is locat-
ed next to the drive motor behind the right hand side panel.
Over an extended period of time, some products, such as frozen cocktails that contain alcohol, have a tendency to
separate, or stratify. Separation of product on the mix storage hopper can result in frozen product quality inconsis-
tency. Simply keeping the product, in the mix storage hopper, stirred on a regular basis will eliminate this problem.
Page 2 Model 3511
Product Tips (cont.)
Some cappuccino or latté mixes contain dairy products which can spoil if not refrigerated. If the freezer is to be turned
off at night these products must be removed from the freezer.
Contact your local health department regarding its regulations for proper mix handling and storage.
Carburetor Assembly
Your new freezer uses a metering device, known as a carburetor, to feed the proper ratio of mix and air into the freez-
ing cylinder (and to prevent frozen product from rinsing out of the freezing cylinder).
The carburetor, or carb tube, is a tube with a hole, or series of holes, bored through the side. It is located in the hop-
per and fits in the hole that leads to the freezing cylinder. Air flows into the freezing cylinder through the top of the
tube and mix flows in through a smaller hole in the side
of the carb tube. The size of the mix inlet hole can be
balanced with the viscosity (thickness) of the liquid mix
and product draw rate, in such a way that the proper
amount of mix is fed into the freezer cylinder to blend
with air at just the right ratio. Mix viscosity varies by mix
type, mix temperature and mix age. Different serving
rates also demand different feed rates. For many prod-
ucts, the proper mix to air ratio is generally accepted
to be two parts mix to one part air. This proportion
yields a finished product that is both tasty and prof-
itable. At this ratio, one gallon of liquid mix will yield a
volume of one and one-half gallons of frozen product. This
additional volume is the overrun in the product. Crathco offers three versions of carb tubes (see Figure A). Depending
on the product being served and overrun requirements there is a standard tube for most slush or cocktail products, a
low overrun carb tube that allows all air trapped in the freezing cylinder to escape and a smoothie/shake carb tube.
This carb tube has an outer sleeve that can be rotated to line up with different hole sizes to provide various levels of
overrun.
Most applications only require the standard carb tube.
Mix Considerations - General
Freezing characteristics are affected by the amount of sweeteners and solids in the mix. The amount of sweeteners
and solids is called BRIX. BRIX can be measured with an instrument called a refractometer. A BRIX reading of
between 11 and 14 will provide optimum freezer operation. Mixes with this BRIX level will freeze down to a smooth,
uniform consistency. Mixes with too high a BRIX level will take longer to freeze down and will yield a soft, wet frozen
product. Mixes with too low a BRIX level will have larger ice crystals and will have a tendency to dispense slowly.
Alcohol content also affects product freezing characteristics. High alcohol content may prevent the freezer from
serving product at proper thickness.
Note: Always take BRIX measurement using mix that has been thoroughly blended, before it is frozen. Always allow
frozen mix to thaw thoroughly before taking a reading.
For maximum output capacity, always pre-chill mix before adding it to the freezer. Pre-chilled mix gives the freezer a
head start on the freezing process and will speed both initial freeze down and recovery time. It is normal for output
capacity to decrease when warm mix is added, or when the freezer is operated in a warm area.
Freezer S
pecifications
Model 3511 Page 3
Figure A
Thick product carb tube
(W0471136)
Low overrun
carb tube
(W0472060)
Standard carb tube
(W0471076)
Model 3511
Electrical
220V / 60Hz / 1 Phase
Dedicated 20 Amp circuit
Drive Motor 1/2 hp, Capacitor Start
Compressor 1 hp
Cooling Air-cooled
Actual Weight 175 lbs (79.4 kg)
Mix Hopper Capacity 5 gallons (18.9 liters)
Freezing Cylinder Capacity 1-1/2 gallons (5.7 liters)
Refrigerant See Serial Number Plate
Refrigerant Charge See Serial Number Plate
High Side Approximately 275-350 psi
Low Side 35-40 psi
Page 4 Model 3511
INSTALLATION
Shipment Transit
1. The freezer has been operated and tested at the factory. Upon arrival the complete freezer
must be thoroughly checked for any damage which may have occurred in transit.
Note: A Tip (N) Tell warning device is placed on each shipping carton at the factory. If the
indicator is red, the carton has been tipped in transit. (See Figure B)
2. THE CARRIER IS RESPONSIBLE FOR ALL DAMAGE IN TRANSIT WHETHER VISIBLE OR
CONCEALED. DO NOT PAY THE FREIGHT BILL until the freezer has been checked for
damage. Have the carrier note any visible damage on the freight bill. If concealed damage
and/or shortages are found later, advise the carrier within 10 days and request inspection. The
customer must place any claim for damage and/or shortage with the carrier. Grindmaster
cannot make any claims against the carrier.
Inst
alling Y
our Unit
1. Place the self-sealing rubber pad (shipped with the freezer) on a level counter that is
stable and strong enough to safely support the freezer’s weight (200 lbs / 90.7 kg), or if
equipped with legs instead of pad, install legs by screwing them into the four leg holes
on the bottom of the unit. (Leg Kit Part # W0890220 (4) 4” Legs)
2. Make sure freezer is to be placed in a location that is within 6’ of a properly grounded
circuit and allows adequate space at each side and above for proper air circulation.
Air Cooled Units Only: Minimum clearance is 6” (15 cm) on both sides and 0” at back
and open above the freezer. (See Figure C)
NOTE: Failure to allow adequate ventilation will void the warranty and reduce
freezer performance.
NOTE: Locating the unit in high ambient temperatures (over 100°F / 37.8°C) will
significantly reduce the performance of your machine.
3. Remove the side panels and supporting all four sides, lift machine up (by the
frame) and place in appropriate area on top of rubber pad.
CAUTION: If equipped with spinner do not lift unit up by spinner shaft. It
will cause serious damage to spinner.
CAUTION: Beverage freezers are heavy pieces of equipment. It is
recommended that moving or lifting the unit be done by two people to
avoid injury.
4. The side panels should still be removed. Cut the cable tie used to secure motor during
shipment. Make sure motor rocks freely. (Figure D)
!
!
Figure B
Figure C
Figure D
Installing Y
our Unit (cont.)
7. Review hopper contents to make sure all parts are available:
8. Fill out Warranty Registration Card with the requested information and mail to Grindmaster Corporation.
9. Replace side panels.
10. Assemble the dispense valve following the instructions on page 9. The valve plunger, spring and retaining pin
come in the small parts bag.
11. Be sure ON-OFF-CLEAN switch (toggle switch located underneath the electrical box) is in the “OFF” position.
12. Connect the power cord directly to a properly grounded DEDICATED 220V/60Hz, 15 Amp circuit. Do not use an
extension cord.
Do not alter or deform the plug in any way! Altering or deforming the plug may damage unit and will
void warranty.
13. Remove the drip tray kit from the bubble wrap. Separate the parts and remove the protective coating. The drip
tray is mounted on two screws that are located on the lower front of the freezer cabinet.
14. Place the key hole slot of the drip tray support bracket (W0471022) on to these screws and tighten the screws.
15. Angle the back of the drip tray surround bracket into the drip tray support bracket (W0471022) and lower bracket
to lock it into place.
16. Place drip tray onto drip tray surround bracket.
17. Place the louvered drip tray insert into drip tray.
!
Part # Description
W0600114 Manual
W0600073 Rubber Pad Sheet
W0600121 Merchandiser Installation Sheet
W0600012 MSDS Sanitizer Sheet
W0600159 Warranty Registration Card
W0890218 Drip Tray Kit
W0520094 Hopper Cover
W0480445 Valve Handle
W0631230 Valve Spring
*
Carb Tube
*
Dispense Valve Plunger
W0470076 Lubricant
W0631903 Sanitizer Packets
W0340022 O-rings
* Optional items specified when the unit is ordered.
Model 3511 Page 5
Accessory Installation
The Model 3511 has several optional accessories that can be added
to the unit in the field to meet your application’s needs. These
accessories come with installation instructions.
• Spinner - Spinners are typically used in applications that add
flavoring to a frozen neutral base product after it is dispensed.
Allows operator to serve a wider variety of frozen drinks from one
machine (i.e. hazelnut added to cappuccino). See Figure E.
• Concealed Air Filter - Prevents dust from clogging the condenser.
Ideal for applications near beaches. Helps maintain maximum air
flow and optimum freezer performance. See Figure F.
NSF approved. Part # W0890200 stainless steel; W0890208 black.
• Exposed Air Filter - Similar to concealed air filter. Not NSF
approved. Part # W0890206. See Figure G.
• Valve Lock Security Bracket - Part # W0471135. Ideal for self-service locations to
prevent unauthorized use. Lock must be purchased separately. See Figure H.
• Remote Fill Control - Automatically refill the mix storage hopper. Provide
additional labor savings by pre-mixing product automatically and monitoring
system to maintain the mix hopper level.
• Private Label Header - A private label or different drink header can be installed by
removing two screws from the electrical box cover. Place the header
(transparency) between the clear and opaque plates (plastic lens). Put these in
place under the lip of the machine top. Slip the electrical box cover back on to the
machine and reinsert the screws. (See Figure I) Grindmaster offers a variety of
drink headers including: frozen beverage, frozen lemonade, cappuccino,
margarita, pina colada, frozen cocktail, frozen daiquiri and smoothie.
OPERATION AND ADJUSTMENTS
How to Operate
1. Sanitize unit following the cleaning instructions starting on page 10.
2. Fill the mix storage hopper following the instructions on page 10. Allow
barrel to fill with product to proper level, then insert carb tube from
parts bag in hole toward rear of hopper. See Figure J.
3. Turn power switch to “ON” position.
4. Allow product to freeze in barrel. Compressor will turn off when product
reaches pre-set consistency.
5. To dispense product pull down valve handle and release when done.
6. If product consistency is not as desired, adjust per the instructions on page 7.
7. Refill mix storage hopper when “mix out” light is ON.
8. Clean the unit regularly following local health codes.
9. Perform maintenance when necessary to increase the life of the unit. See
chart in this manual for regular maintenance schedule.
Mix Low Function
1. This model utilizes a simple float mechanism to sense when mix is low in
hopper. (See Figure J) When the mix level in the hopper is low, the mix low
light located in the front of the machine next to the valve block will illuminate.
NOTE: Do not run the unit under mix low conditions for long periods of time. This
can affect machine performance or damage componentry.
Page 6 Model 3511
Figure E
Spinner mounting bracket
Spinner
Mounting screws
FILTER
Figure F
Figure G
Electrical box
SLIDE THE FILTER IN BEHIND
THE FILTER PANEL, & IN FRONT
OF THE EXISTING SIDE PANEL.
TO CHANGE, REMOVE, CLEAN
AND/OR REPLACE.
Figure H
Figure I
Consistency Adjustment
From time to time, it may become necessary to readjust the consistency setting (thickness) to compensate for
variation between different mixes or to switch from one type of product to another. This adjustment is made
as follows:
1.
Disconnect electrical power.
WARNING: Do not attempt to readjust the freezer until electrical
power has been disconnected.
2. Remove right side panel (facing the freezer).
3. Use the adjustment screw, situated on the front of the drive motor
mounting bracket to change product thickness. Turn the thumbscrew
(3 full turns for red spring, 1 turn for yellow spring) to make a noticeable
change in consistency. (See Figure K)
NOTE: Clockwise is for thicker product consistency and counter clockwise
is for thinner product consistency. (See Figure L)
4. Reinstall the side panel, reconnect power.
5. Turn freezer to “ON” and allow it to freeze to desired consistency.
6. Check product. Repeat process until desired consistency is achieved.
NOTE: When making changes to a colder (thicker) setting, recheck consistency
again after the compressor has cycled off. When adjusting
(counter-clockwise) to a thinner consistency, a large portion of product should be
drawn from the dispense valve to reduce the product thickness below the new set
point (adjustment). Then allow the freezer to refreeze product to the new setting.
!
Figure J
Figure K
Adjustment Screw
Increase Thickness
(turn clockwise)
Decrease Thickness
(turn counterclockwise)
Figure L
Model 3511 Page 7
Mix Low Float O-ring
Carburetor
Mix Low Float
CARE AND CLEANING
Cleaning and sanitizing frequency must be followed according to state and local health department regulations.
NOTE: Each time the freezer is fully disassembled, all foodzone freezer components must be thoroughly washed
and sanitized using procedures recommended by the local health department. In lieu of local health department
recommendations, use a three compartment sink; one compartment to wash parts in detergent, one compartment to
rinse, and one to sanitize.
Drain and Rinse
1. If the freezer is empty, proceed to Disassembly and Cleaning. If there is product in the freezer, turn the front panel
switch to “CLEAN”. Most users schedule cleaning when product in the hopper is low to minimize product loss.
2. On freezers using the optional Remote Fill Control and Proportioning Pump, turn “OFF” the water valve on the
Proportioning Pump, using the valve next to the inlet pressure regulator and turn the switch on the Remote Fill
Control to “OFF”.
3. Open the front dispensing valve and drain all product from the freezer. Close the dispensing valve and turn
freezer to “OFF”.
NOTE: Use approximately 2½ gallons (10 liters) of cool water to rinse product out of freezer.
4. Remove the carburetor tube and pour water into the storage hopper. Allow the water to fill the freezing cylinder.
5. Turn the panel switch to “CLEAN” for 5 minutes.
6. Open the dispensing valve and drain the water from the freezer.
7. Turn the freezer “OFF”.
Disassembly and Cleaning
Note: For cleaning and sanitizing before initial start-up remove carb tube, dispense plunger, handle and spring from
parts bag first.
1. Disassemble the dispensing valve assembly (Figure M). Pull out valve handle retaining pin while supporting the
valve plunger from the bottom (Figure N). Push up on the valve plunger and remove the stainless handle
(Figure O). Slide the valve plunger and spring downward to remove (Figure P).
2. Remove knobs and carefully remove the front dispensing valve assembly, leaving the dasher assembly in the
cylinder. Remove the o-rings from the plunger assembly and back of the dispensing valve body. (See Figure Q)
NOTE: The best way to remove an o-ring is to first wipe off all of the lubricant using a clean paper towel. Pinch the
o-ring upward with a dry paper towel between your index finger and thumb. When a loop is formed in the o-ring, roll
it out of the groove with your other thumb. Always remove the o-ring farthest from the end of the plunger first.
Carefully inspect the o-rings and replace if necessary. (See Figure Q)
3. Remove the dasher assembly from inside the freezing cylinder taking care to avoid
damaging the rear seal assembly at the back of the freezing cylinder. Disassemble
the dasher assembly by removing the scraper blades, stator rod and front and rear
stator rod bearings.
Figure N Remove Pin
Figure M Disassemble
Dispensing Valve
Figure O Remove Handle
Figure P Remove
Plunger and Spring
Figure Q Ring Removal
Page 8 Model 3511
Model 3511 Page 9
Disassembly and Cleaning (cont.)
4. Remove stationary half of the shaft seal assembly from the back end of the
freezer cylinder. This is accomplished by reaching into the cylinder and pulling seal
out with your index finger. (See Figure R)
5. Slide the rotary half of the seal off the dasher shaft. Inspect both seal components
carefully for nicks or cracks. Replace seal if defective.
NOTE: To prevent leakage the surfaces of the rotary seal and the stationary seal must be
smooth with no chips or cracks.
NOTE: All units are shipped with a standard ceramic seal (Part # W0340201) unless
otherwise specified. Certain products contain coconut oil which requires a different sealing
material. For these products use the coconut oil seal (Part # W0340210). The stationary
half of the standard seal has a white polished surface. The stationary half of the coconut
oil seal has a glossy black surface.
6. Remove carb tube from bottom of hopper and remove o-rings. (See Figure S).
7. Remove drip tray and empty contents.
8. Take all components to the cleaning area.
9. Prepare 1 gallon solution of hot tap water and a good grade of dishwashing detergent.
10. Thoroughly wash all components in a warm, mild detergent solution including the
inside of the freezing cylinder and the mix storage hopper. DO NOT WASH
COMPONENTS IN A DISHWASHER.
11. Use a medium sized brush to clean the bottom of the valve body and the inside of
the plunger bore with detergent solution taking care to remove only remaining
lubricant. (Figure T)
12. The exterior of the freezer should be cleaned as needed with a cloth towel.
CAUTION: Coarse rags, abrasive cleaners and excessive force can
damage and/or scratch the surfaces of the freezer.
Reassembly
NOTE: Allow all parts to dry completely before reassembly.
1. Reassemble drip tray and re-install on front of unit.
2. Wet the inner rubber lip of the rotary half of the seal and the back end of
the dasher shaft with water. Slide rotary half of assembly onto the dasher shaft,
RUBBER FIRST, with the smooth sealing surface facing the back of the dasher.
(See Figure U). Be sure the rotary half is fully seated against the shoulder of
the shaft.
3. Insert the stationary half of the seal into the ribbed rubber boot with the
polished surface facing out (forward).
4. Lightly lubricate the ribbed rubber boot of the stationary ceramic seal (taking care
not to get any lubricant on the polished surface) and insert it straight back into the
recess at the back of the freezing cylinder, RUBBER FIRST. (See Figure V)
NOTE: The stationary half of the seal must be completely dry before reassembling. If the
circular half of the seal is white, make sure that the grooved side is toward the rubber. If the
circular half is black, be sure the glossy side is facing out.
5. Reassemble the dasher assembly, as shown in Figure W. Insert the larger front
and smaller rear white plastic bearings into dasher, then slip in the stator rod. Attach
scraper blades.
6. Carefully and slowly guide the dasher into the freezing cylinder, taking care
not to damage the seal assembly. Turn dasher shaft until it engages the square
drive coupling. Slide the dasher back into the cylinder so that the two smooth
sealing surfaces meet. (See Figure X)
7. Inspect and lightly lubricate the large square o-ring
and refit it into the back of the valve block
assembly. Install the valve assembly on the front
studs and tighten the knobs until they are finger
tight.
Do not use tools to tighten knobs.
NOTE: Failure to lightly lubricate the large o-ring can
result in product leakage.
Figure R Installing the
stationary half of seal
Figure S Carb Tube
Figure V Installing the
stationary half seal
Figure U Re-assemble rotary
half of seal as shown
!
Figure T Clean Valve Body
Figure X Seal Assembly
Figure W Dasher Assembly
Page 10 Model 3511
Sanitizing and Refilling
1. Reassemble carburetor by installing the two o-rings at the bottom of the carb tube.
2. Place the carburetor assembly in the bottom of the hopper.
3. Install the o-rings on valve plunger and lay plunger assembly on a clean piece
of paper towel.
4. Prepare a minimum of 2.5 gallons (9.5 liters) of sanitizing solution (Kay-5
Sanitizer/Cleaner or equivalent) following the manufacturer’s instructions.
NOTE: Add 1 ounce of Kay-5 to 2.5 gallons (9.5 liters) of 120°F (50°C) water to
achieve a concentration of 100 parts per million.
5. Dip a medium sized brush into the sanitizing solution and sanitize the inside bore
of the dispensing valve. (Figure Y)
6. Place a small amount of lubricant onto a piece of clean paper toweling. Use a clean
piece of paper toweling to pick up the small end of the valve plunger assembly.
Apply a thin film of lubricant from the other piece of paper toweling. (Figure Z)
7. Slide the valve plunger spring over the small end of the valve plunger and, using
another clean piece of paper toweling, pick up the valve plunger at the outlet end
and insert plunger and spring into the valve body. (Figure AA)
8. Push up on the valve plunger and insert the stainless steel handle. (Figure BB)
9. Holding the handle down slightly so that the hole in the handle and valve block are
aligned, insert the dispensing valve handle retaining pin. (Figure CC)
10. Pour sanitizing solution into the mix storage hopper and allow the solution to fill
freezing cylinder. Use a large brush to sanitize all hopper surfaces. (Figure DD)
11. Turn panel switch to “CLEAN” and allow freezer to run for 5 minutes.
12. Open dispensing valve and drain solution. Allow the dasher to push remaining
sanitizer out of the freezing cylinder. Once the sanitizing solution is drained,
turn panel switch to “OFF”.
13. Place a small amount of sanitary lubricant onto another piece of clean paper
toweling. Use a clean piece of paper toweling to pick up the large end
of the carburetor from the bottom of the hopper taking care not to touch the
sanitized carburetor with your bare hand (Figure EE). Apply the lubricant on the
other piece of paper toweling to the two o-rings on the bottom of the carburetor
assembly (Figure EE).
14. Place the lubricated carburetor assembly on a clean piece of paper
toweling.
15. Prepare fresh product according to manufacturer’s instructions.
16. Hold open the dispensing valve and pour product (approx. 10 oz.) into the
hopper to allow this product to chase out any remaining sanitizer. Watch the
product flowing out of the dispensing valve and close the valve when the new
mix has purged the sanitizer remaining in the cylinder.
17. Use a clean piece of paper toweling to insert the sanitized carburetor assembly
into the inlet hole in the hopper.
18. Fill mix storage hopper with fresh product. Cover hopper with hopper lid.
19. Turn front panel switch to “ON”. Allow the freezer to reach proper consistency.
Figure Y Sanitize Valve Body
Figure Z Lubricate Plunger
Figure AA Installing Plunger and Spring
Figure CC Insert Retaining Pin
Figure BB Insert Valve Handle
Figure DD Sanitize Hopper Figure EE Lubricate Carb Tube
Clean-In-Place Procedure (Daily Cleaning)
This equipment has been approved for a Clean-In-Place procedure that does not require complete disassembly on a
daily basis. The unit still requires regular complete disassembly for cleaning and sanitizing. To perform the C-I-P
procedure follow the instruction below:
1. Empty any product in the machine and turn to OFF.
2. Disassemble the dispensing valve assembly following the instructions in Disassembly and Cleaning
.
NOTE: Leave the valve block in place. Only disassemble the plunger, handle, spring, o-rings and pin.
3. Remove carburetor assembly from hopper and remove o-rings.
4. Take all components to the cleaning area.
5. Carefully inspect the o-rings for cracks, chips or cuts and replace if necessary.
6. Prepare 1 gallon solution of hot tap water and a good grade of dishwashing detergent.
7. Thoroughly wash all parts including handle, pin, valve plunger, spring, carburetor assembly and all o-rings in
detergent solution.
8. Use a medium sized brush to clean the bottom of the valve body and the inside of the plunger bore with detergent
solution taking care to remove any remaining lubricant.
9. Reassemble following the instructions under Sanitizing and Refilling
.
NOTE: Run the unit with sanitizer on “CLEAN” for 20 minutes before draining and refilling.
MAINTENANCE
WARNING: Disconnect power for maintenance. Do not attempt to perform maintenance on the freezer
until electrical power has been disconnected.
Suggested Daily Maintenance
1. Clean, lubricate and sanitize the freezer following guidelines.
2. Clean the exterior of the freezer using a soft wet cloth. (Wipe down spinner if attached)
3. Empty drip tray.
Part
s Replacement Schedule
Refer to the Crathco Parts Price List when ordering the above parts
!
Part
Description
Monthly
Every 3
Months
Every 6
Months
Annually
Quantities to
be Replaced
Shaft Seal
(W0340201 or W0340210)
Replace 1
Drive Shaft
(W0451067)
Inspect & replace if
necessary
1
Drive Belts
(W0450209)
Inspect & replace if
necessary
1
Scraper blades on dasher
(if equipped)
(W1431084)
Replace
2
Square cut o-ring on valve
body/face plate
(W0340055)
Inspect & replace if
necessary
1
Front stator flange bearing
(W0430032)
Replace 1
Rear stator flange bearing
(W0430024)
Replace 1
Dispense valve o-rings
(W0340022)
Replace
Thick Product
Plunger: 2
Standard Product
Plunger: 3
Carb tube o-rings
(W0340011)
Replace 2 or 3
Condenser
Inspect & clean
if necessary
(Air-cooled units only)
1
Model 3511 Page 11
Page 12 Model 3511
Preventative
Maintenance Procedure (Every 6 to 12 Months)
A preventative maintenance visit should be performed every 6 to 12 months depending on the usage and environ-
ment where the unit is placed. (Ex. seasonal machines - once before season, year round machines - twice per year).
The following procedures should be performed during a preventative maintenance visit. This does not take the place
of daily care and cleaning procedures as described by local health codes and the manual. PM kit #W0890157 con-
tains the standard replacement parts needed for preventative maintenance including o-rings, standard seal kit stator
bearings and drive belt. Units with a coconut oil product seal should order all parts separately. Units with scraper
blade dasher will require the scraper blades be ordered separately.
• Verify ventilation is adequate (Air-cooled units: 6” minimum on both sides, open at top, and as far as possible from
dust sources; Water-cooled units: 0” on both sides, 3 - 6” at rear of unit and open at top).
• Verify adequate water flow and drain connections on water-cooled versions.
• Check product temperature and consistency for proper setting (refer to product manufacturer’s recommendation) -
adjust if necessary. Where equipped be sure to check the temperature in both the hopper and cylinder.
• Ensure product is being mixed properly and is within specification (check brix - most products should be around
13% - refer to product manufacturer’s recommendations for exact recommended brix).
• Check for any leaks.
• Empty product from the unit. Disassemble unit completely (as if for cleaning).
• Clean and sanitize all disassembled parts following the cleaning instructions in the manual.
• Clean and sanitize hopper, freezing cylinder and splash zones on the machine.
• Check condition of all panels and lids - replace if necessary.
• Check dasher scraper blades for wear if equipped - replace once per year minimum.
• Check dasher for signs of wear - replace if necessary. Verify alignment when replacing.
• Check valve body gasket for wear - replace once per year minimum.
• Check valve body knobs (used to hold valve body in place) - replace if necessary.
• Check condition of shaft seals and stator bearings - replace once per year minimum.
• Inspect drip cup at back end of freezing cylinder for signs of seal leakage.
• Replace o-rings on hopper float (where necessary), dispense valves and carb tubes (lubricate).
• Lubricate parts where appropriate (dispense valve o-rings, carb tube o-rings, rubber boot of stationary shaft seal).
• Re-assemble unit and sanitize hopper and freezing cylinder by running CLEAN cycle.
• Clean and sanitize spinner if equipped.
• Check operation of merchandiser and mode lights - replace light bulbs if necessary.
• Clean reusable filter if equipped. Check condition of filter and replace if necessary.
• Clean condenser.
• Inspect the drive shaft and motor shaft bearings for excessive wear (drive shaft hole rounding out) - replace if
necessary. Verify alignment when replacing.
• Check V-belt tension (should be 1/2” - 5/8”) and verify all set screws are tightened - adjust if out of range. Replace
belt once per year minimum.
• Verify compressor operation and freezer controller operation.
• Check electrical connections (outlet should be properly grounded with amperage capacity equal to or over the
amperage specified on the serial tag).
• Check fan operation (condenser fan) and clean fan blades if necessary.
• Review proper periodic care and cleaning instructions (disassembly, cleaning, sanitizing, lubrication, and
re-assembly) with store personnel. Train store personnel to follow proper procedures (stress importance of store
level maintenance ie. lubrication, filter cleaning, etc.).
• Make sure store personnel have appropriate supplies (lubricant, cleaning brushes and sanitizer) to care for
machine.
How to Clean Condenser (Air-Cooled Unit Only)
NOTE: Loss of refrigeration efficiency will result if condenser is allowed to become dirty. Excessive compressor run
time or loss of capacity are a good indication that the condenser needs to be cleaned.
1. Disconnect electrical power.
2. Remove side panels.
3. Place a damp towel over the side of the condenser opposite the fan motor.
4. Use compressed air or CO2 blow out dirt from the fan side of the condenser. An alternate cleaning method is to
use a condenser brush and vacuum cleaner.
CAUTION: Procedure can create a loud noise.
How to Clean Exposed Filter (Air-Cooled Unit Only)
1. Slide exposed filter out of the rails by pulling forward on the filter. It is recommended to remove the filter by using
the palm of your hand and applying even pressure to the face of the filter.
2. Clean filter with liquid soap and water.
3. Soak filter for 15 minutes.
4. Rinse filter with heavy stream of water, opposite the direction of air flow. Allow filter to dry.
5. Slide the filter into the rails until the filter contacts the stop on the top rail.
How to Clean Concealed Filter (Air-Cooled Unit Only)
1. For concealed filters lift lid and pull up on filter tab to remove filter.
2. Clean filter with liquid soap and water.
3. Soak filter for 15 minutes.
4. Rinse filter with heavy stream of water, opposite the direction of air flow. Allow filter to dry.
5. Slide filter into top of filter cover with removal clip up and the air flow arrows facing the existing panel.
How to
Adjust Belt
CAUTION: Unplug the machine before performing any adjustments. This procedure must be done by a
qualified technician.
Check the belt tension. The proper belt deflection is 1/2” over all. If the deflection
is more than 1/2” the motor will need to be lowered. If the deflection is less than
1/2”, the motor will need to be raised. Follow this procedure to adjust the motor to
achieve proper belt tension. (See Figure FF)
1. Unplug the machine and remove both side and rear panels.
2. Locate the motor flange bearings. These are the side mounted bearings that
hold the motor to the cradle. The motor is double shafted and the shaft
extends through a bearing on each end. The bearing is held to the motor
cradle by two allen bolts on each bearing.
3. Loosen the allen bolts on each bearing. Do not loosen the setscrews that hold
the bearing collar to the motor shaft.
4. Lower the motor or raise the motor as needed. The motor must be kept level from front to back. Do not lower or
raise only one end of the motor. This will result in excessive belt wear and belt noise.
5. Tighten all four allen bolts down. Align the motor pulley with the top pulley if needed.
6. The motor pulley should be in alignment with the large (driven) top pulley. Use a straight edge along the
top pulley.
7. If the pulleys are not in alignment, loosen the setscrew on the motor pulley and move either in or out as needed.
8. Tighten the setscrew back down on the motor shaft (use of non-permanent loc-tite is recommended). Please be
sure the setscrew is tightened down on the flat surface of the motor shaft.
9. Return the unit back to service.
How to Change Back Lit Sign Merchandiser Bulb
1. Remove the two screws, located on the top of either side of the sign.
2. Lower the metal enclosure that frames the merchandiser insert.
3. Pull merchandiser enclosure down and out.
4. Replace bulb inside.
5. Reassemble. For ease of assembly, put merchandiser in light box before placing metal enclosure back on.
!
!
Figure FF
Model 3511 Page 13
Page 14 Model 3511
GENERAL TROUBLESHOOTING
Freezer problems originate from three sources - improper operation, mix problems or mechanical malfunction.
Always check for improper operation and mix problems first, as they are the most common cause of most equipment
problems.
CAUTION: Always disconnect power before attempting any maintenance procedures.
Only a qualified service technician should perform electrical and mechanical adjustments or repairs.
!
PROBLEM PROBABLE CAUSE REMEDY
Machine will not run or freeze down • Machine not plugged in
• Circuit breaker tripped or fuse blown
• Machine in CLEAN or OFF position
• Obstructed condenser air flow
(Air-cooled units)
• Compressor not operating
• Dasher not installed
• Low refrigerant charge
• Plug machine in
• Reset breaker or replace fuse
• Switch to ON position
• Clean condenser. Allow 6” (15 cm)
on both sides
• Check for cause and correct
• Install dasher (auger)
• Check for leaks, repair and recharge
Product too soft • Consistency setting too loose
• Consistency setting at maximum
(red spring)
• Product BRIX level too high
• Too much alcohol in mix
• Readjust consistency control
• Change to yellow consistency spring
• Lower liquid product BRIX level
• Lower alcohol content
Product too stiff • Consistency adjuster set too firm
• Product BRIX level too low
• Readjust consistency setting or change
to red spring
• Increase product BRIX level
Product will not dispense • Power switch OFF
• Inadequate mix in hopper. Red MIX
LOW light on
• Consistency adjuster set too firm
• Carburetor inlet hole clogged
• Drive belt broken or off pulley
• Drive shaft worn
• Drive motor failure
• Turn power switch ON
• Refill hopper
• Readjust consistency setting
• Unclog carburetor inlet hole
• Repair or replace
• Inspect square drive shaft pocket for
excessive wear, replace
• Replace motor
Leakage from drain tube, front of freezer
above drip tray
• Worn or defective shaft seal
• Seal installed incorrectly
• Replace seal and then lubricate at
each cleaning
• Remove and install seal
Excessive Dispensing Valve Leaks • Worn or defective o-ring(s) • Replace and lubricate
Clicking sound from inside machine • Low voltage
• Extension cord is used
• Use dedicated circuit with proper
rating
• Connect directly to power source or
use power cord of proper size
Thumping sound from inside machine • Worn belt • Replace belt
Scraping sound during freeze down • Frozen product scraping off of
cylinder walls
• No product in machine
• Sound should go away when product
is frozen to proper consistency
• Fill with product
Premature seal wear • Incorrect installation of dasher
• Improper drive shaft clearance
• Incorrect shaft alignment
• Advise careful installation
• Adjust to proper
• Align shaft
Merchandiser light flickers when freezer
cycles
• Low voltage • Connect freezer to dedicated circuit
with proper rating
If you still need help, call our Service Department at (800) 695-4500 (Monday through Friday 8am - 6pm EST) or an authorized service
center in your area. Please have the model and serial number ready so that accurate information may be given. Prior authorization
must be obtained from Grindmaster’s Technical Services Department for all warranty claims.
1
2
Rough Side
of Ceramic
Smooth
Shiney Side
CHECK LIST
PARTS IDENTIFICATION
Coconut Oil Seal (W0340210) and Standard Seal
(W0340201) include 1,2, & 3.
Slush Plunger (W0480438)
Thick Product Plunger
(W0480451)
(W0430026)
Scraper Blade Dasher (W0430089)
(W0631230)
Use with scraper blade dasher
Model 3511 Page 15
Page 16 Model 3511
Exploded View
Model 3511
ITEM NO. PART NO. DESCRIPTION ITEM NO. PART NO. DESCRIPTION
1 W0201272 Cylinder Assembly 28 W0472062 Pan, Drip Form X-LG
2 W0210106 Base Pan Assembly 29 W0472063 Insert, Drip Pan X-LG
3 100740 1 HP Compressor, 230V 30 W0472064 Drip Pan Bracket
4 W0200256 Condenser Coil, Air, CFB 31 W0630711 Valve Knob
5 W0322000 Fan Assy, 220/60 32 W0631632 Drip Tray
6 W0321026 Drive Motor Assembly 33 W0611728 FasPin, Valve
7 W0210083 Frame Assembly 34 W0480451 Thick Product Plunger
8 W0572247 Electrical Box Assembly 35 W0110013 Valve Studs
9 W0570047 Ballast 36 W0611085 Nut, 5/16-18 S.S. Hex Nut
10 W0572290 Light Reflector 37 W0340022 Plunger O-Rings
11 W0631610 Front Display Lens 38 W0570018 Light, Indicator LT Red 12V
12 W0631614 Acrylic Lens 39 W0520063 Rear Machine Panel
13 W0572452 Electrical Box Cover 40 W0520065 Right Side Panel
14 W0211112 Drain Tube Fitting 41 W0520107 Left Side Panel
15 W0340058 Barrell Gasket 42 W0380025 Bearing, 1” Bore
16 W0340007 #108 Float O-Ring 43 W0451067 Driveshaft, Slush
17 W0570941 Mix Low Indicator Float 44 W0450209 Belt, V
18 W0430089 Dasher Weldment, Scraper 45 W0450053 Pulley, 10”
19 W1431084 Scraper Blade, New Style 46 W0471075 Carb Tube, Slush/Cocktail
20 W0430029 Stator Rod 47 W0340011 O-Ring, -115 Buna-N Carb Tube
21 W0430024 Rear Stator Bearing 48 W0520094 Hopper Cover
22 W0340201 Shaft Seal Set 49 W0570043 Bulb, Fluoresent
23 W0430032 Stator Flange Bearing 50 W0480438 Slush Plunger, Standard
24 W0480450 Valve Body 51 W0572511 Bracket, Capacitor Support
25 W0340055 Valve Square Cut O-Ring 52 W0570617 Run Capacitor
26 W0631230 Valve Spring 53 W0570619 Start Capacitor
27 W0480445 Valve Handle
Model 3511 Page 17
Model 3511
Base Assembly
ITEM
PART
NUMBER
DESCRIPTION ITEM
PART
NUMBER
DESCRIPTION
1 W0210169 Motor Cradle 7 W0610559 Bolt for Bearing
2 W0320020
Motor, Drive Dual Cycle
1/2HP
8 W0611249 Washer, Split, Lock, Z/P
3 W0321013 Nut, Motor Adjustment 9 W0671022
Insulation, Motor Brkt
Sound
4 W0321027 Pin Sleeve 10 W0170014 Consistency Control
5 W0380009 1” Bore Flange Bearing 11 W0321025 Motor Stop Brkt Assy
6 W0450016 Pulley, 0K7 x 1/2” Browning 12 W0630421 Cable Clamp
Drive Motor Assembly (See figure on left)
Page 18 Model 3511
Model 3511
Electrical Box Assembly
Contactor
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